//看题目2.10

Status DeleteK(SqList &a,int i,int k)
{
	if(i < 1 || k < 0 || i + k > a.length)
		retrun INFEASIBLE;
	else
	{
		for(j = a.length - 1;j > i + k;j--)
			a.elem[j - 1] = a.elem[j];
		a.length--;
	}
}
